I'm doing the Teaching Assistant program in La Reunion, and I want to apply to some of the local language schools for extra hours. When applying to a language school in France, can I send them my English CV, or am I expected to translate it into French first?

English CVs are perfectly fine in Paris. And plenty of the language schools here are not run by French people, though I guess the majority probably are. But anyway, I can't speak for the rest of France.